2100120201 has 6 divisors (see below), whose sum is σ = 3033506970. Its totient is φ = 1400080128.

The previous prime is 2100120157. The next prime is 2100120221. The reversal of 2100120201 is 1020210012.

It can be written as a sum of positive squares in only one way, i.e., 1998090000 + 102030201 = 44700^2 + 10101^2 .

It is not a de Polignac number, because 2100120201 - 2⁷ = 2100120073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 233346689 = 2100120201 / (2 + 1 + 0 + 0 + 1 + 2 + 0 + 2 + 0 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100120221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116673336 + ... + 116673353.

It is an arithmetic number, because the mean of its divisors is an integer number (505584495).

Almost surely, 2^2100120201 is an apocalyptic number.

It is an amenable number.

2100120201 is a deficient number, since it is larger than the sum of its proper divisors (933386769).

2100120201 is a wasteful number, since it uses less digits than its factorization.

2100120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233346695 (or 233346692 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2100120201 is about 45827.0684312230. The cubic root of 2100120201 is about 1280.6035973620.

Adding to 2100120201 its reverse (1020210012), we get a palindrome (3120330213).

The spelling of 2100120201 in words is "two billion, one hundred million, one hundred twenty thousand, two hundred one".